1 files changed, 139 insertions, 0 deletions
diff --git a/atomic/os390/atomic.c b/atomic/os390/atomic.c
new file mode 100644
index 0000000..e6a1693
--- /dev/null
+++ b/atomic/os390/atomic.c
@@ -0,0 +1,139 @@
+/* Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "apr_arch_atomic.h"
+
+#include <stdlib.h>
+
+apr_status_t apr_atomic_init(apr_pool_t *p)
+{
+#if defined (NEED_ATOMICS_GENERIC64)
+    return apr__atomic_generic64_init(p);
+#else
+    return APR_SUCCESS;
+#endif
+}
+
+apr_uint32_t apr_atomic_add32(volatile apr_uint32_t *mem, apr_uint32_t val)
+{
+    apr_uint32_t old, new_val; 
+
+    old = *mem;   /* old is automatically updated on cs failure */
+    do {
+        new_val = old + val;
+    } while (__cs(&old, (cs_t *)mem, new_val));
+    return old;
+}
+
+void apr_atomic_sub32(volatile apr_uint32_t *mem, apr_uint32_t val)
+{
+     apr_uint32_t old, new_val;
+
+     old = *mem;   /* old is automatically updated on cs failure */
+     do {
+         new_val = old - val;
+     } while (__cs(&old, (cs_t *)mem, new_val));
+}
+
+apr_uint32_t apr_atomic_inc32(volatile apr_uint32_t *mem)
+{
+    return apr_atomic_add32(mem, 1);
+}
+
+int apr_atomic_dec32(volatile apr_uint32_t *mem)
+{
+    apr_uint32_t old, new_val; 
+
+    old = *mem;   /* old is automatically updated on cs failure */
+    do {
+        new_val = old - 1;
+    } while (__cs(&old, (cs_t *)mem, new_val)); 
+
+    return new_val != 0;
+}
+
+apr_uint32_t apr_atomic_read32(volatile apr_uint32_t *mem)
+{
+    return *mem;
+}
+
+void apr_atomic_set32(volatile apr_uint32_t *mem, apr_uint32_t val)
+{
+    *mem = val;
+}
+
+apr_uint32_t apr_atomic_cas32(volatile apr_uint32_t *mem, apr_uint32_t swap, 
+                              apr_uint32_t cmp)
+{
+    apr_uint32_t old = cmp;
+    
+    __cs(&old, (cs_t *)mem, swap);
+    return old; /* old is automatically updated from mem on cs failure */
+}
+
+#if APR_SIZEOF_VOIDP == 4
+void *apr_atomic_casptr(volatile void **mem_ptr,
+                        void *swap_ptr,
+                        const void *cmp_ptr)
+{
+     __cs1(&cmp_ptr,     /* automatically updated from mem on __cs1 failure  */
+           mem_ptr,      /* set from swap when __cs1 succeeds                */
+           &swap_ptr);
+     return (void *)cmp_ptr;
+}
+#elif APR_SIZEOF_VOIDP == 8
+void *apr_atomic_casptr(volatile void **mem_ptr,
+                        void *swap_ptr,
+                        const void *cmp_ptr)
+{
+     __csg(&cmp_ptr,     /* automatically updated from mem on __csg failure  */
+           mem_ptr,      /* set from swap when __csg succeeds                */
+           &swap_ptr);  
+     return (void *)cmp_ptr;
+}
+#else
+#error APR_SIZEOF_VOIDP value not supported
+#endif /* APR_SIZEOF_VOIDP */
+
+apr_uint32_t apr_atomic_xchg32(volatile apr_uint32_t *mem, apr_uint32_t val)
+{
+    apr_uint32_t old, new_val; 
+
+    old = *mem;   /* old is automatically updated on cs failure */
+    do {
+        new_val = val;
+    } while (__cs(&old, (cs_t *)mem, new_val)); 
+
+    return old;
+}
+
+APR_DECLARE(void*) apr_atomic_xchgptr(volatile void **mem_ptr, void *new_ptr)
+{
+    void *old_ptr;
+
+    old_ptr = *(void **)mem_ptr; /* old is automatically updated on cs failure */
+#if APR_SIZEOF_VOIDP == 4
+    do {
+    } while (__cs1(&old_ptr, mem_ptr, &new_ptr)); 
+#elif APR_SIZEOF_VOIDP == 8
+    do { 
+    } while (__csg(&old_ptr, mem_ptr, &new_ptr)); 
+#else
+#error APR_SIZEOF_VOIDP value not supported
+#endif /* APR_SIZEOF_VOIDP */
+
+    return old_ptr;
+}